Crossword Genius

Great deal involving railway boosted region (5)

Ross

I believe the answer is:

tyrol

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'region' is the definition.
(Tyrol is an example)

I cannot understand how the remainder of the clue works.

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(Other definitions for tyrol that I've seen before include "ski region" , "Austrian province" , "Alpine state of Austria" , "Austrian Alpine state (English spelling)" , "hills here" .)

I've seen this clue in The Independent.
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